Go对于此SQL查询中的第二个参数想要什么。我正在尝试IN在postgres中使用查找。
IN
stmt, err := db.Prepare("SELECT * FROM awesome_table WHERE id= $1 AND other_field IN $2") rows, err := stmt.Query(10, ???)
我真正想要的是:
SELECT * FROM awesome_table WHERE id=10 AND other_field IN (this, that);
查询只是使用varargs来替换sql中的参数,因此,在您的示例中,您只需要执行
rows, err := stmt.Query(10)
例如,这个和第二个示例的内容是动态的,那么您将
stmt, err := db.Prepare("SELECT * FROM awesome_table WHERE id=$1 AND other_field IN ($2, $3)") rows, err := stmt.Query(10,"this","that")
如果“ IN”部分具有可变的args,则可以执行(播放)
package main import "fmt" import "strings" func main() { stuff := []interface{}{"this", "that", "otherthing"} sql := "select * from foo where id=? and name in (?" + strings.Repeat(",?", len(stuff)-1) + ")" fmt.Println("SQL:", sql) args := []interface{}{10} args = append(args, stuff...) fakeExec(args...) // This also works, but I think it's harder for folks to read //fakeExec(append([]interface{}{10},stuff...)...) } func fakeExec(args ...interface{}) { fmt.Println("Got:", args) }